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[Python-Dev] (Licensing question) PSF license


On Tue, 12 Mar 2019 01:27:14 -0400
Terry Reedy <tjreedy at udel.edu> wrote:
> > First of all, I'm sorry if I'm wrong.  I'm not lawyer.
> > 
> > You can use both of GPL and MIT.  Users can use your package under it.
> > 
> > On the other hand, when you publish your package, *you* should follow
> > PSF license.
> > Read this.  https://docs.python.org/3/license.html
> > 
> > """
> > 3. In the event Licensee prepares a derivative work that is based on or
> >     incorporates Python 3.7.2 or any part thereof, and wants to make the
> >     derivative work available to others as provided herein, then Licensee hereby
> >     agrees to include in any such work a brief summary of the changes
> > made to Python
> >     3.7.2.
> > """
> > 
> > As you can see, PSF license doesn't force you to use PSF license. (not
> > "copyleft")  
> 
> In fact, the PSF lawyer says one should not use the 'PSF license' as it 
> is specilized for the PSF and Python.

Interesting.  I did use the PSF license for the pickle5 backport and I
suspect I'm not the only one to use it (though I don't know how to do
a per-license search on PyPI).
https://pypi.org/project/pickle5/

Regards

Antoine.